Sökning: "surface sediment"

Visar resultat 1 - 5 av 145 uppsatser innehållade orden surface sediment.

  1. 1. ASSESSING MICROBIAL COMMUNITY RESPONSES IN A CHEMICALLY STRESSED FRESHWATER ECOSYSTEM USING ENVIRONMENTAL DNA

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Nicolai Laufer; [2023-06-21]
    Nyckelord :;

    Sammanfattning : Microbial communities represent the fundamental cornerstones of riverine ecosystems because they are involved in numerous processes which mediate ecosystem services. However, riverine ecosystems are currently massively altered by a variety of anthropogenic activities which includes changes in landuse and chemical pollution. LÄS MER

  3. 2. Fytoremediering med flytande våtmark: En fallstudie av metallförorenade vattendrag.

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för biologi och miljö (BOM)

    Författare :Johanna Junback; [2023]
    Nyckelord :Fytoremediering; flytande våtmark; FTW; metaller; glastillverkning; förorenade vatten; Carex nigra; Lysimachia vulgaris;

    Sammanfattning : Tungmetallförorenat vatten har ansetts vara ett av de största globala miljöproblemen och att hitta en hållbar miljövänlig lösning är en stor utmaning. Många glasbruk i södra Sverige fortsätter att vara källor för metallföroreningar. LÄS MER

  4. 3. Comparing chemical biodegradation assessed in water-sediment suspensions

    Master-uppsats, Stockholms universitet/Institutionen för miljövetenskap

    Författare :Kangli Lin; [2023]
    Nyckelord :water- sediment suspensions; OECD 309; biodegradation; sediment concentrations; bacterial cell count;

    Sammanfattning : Many chemicals are released into surface water and biodegradation is one important mechanismto remove the contaminants. Their actual concentrations in water depend on their persistence.The OECD 309 test is the most recognized method to assess the persistence of chemicals in theaquatic environment. LÄS MER

  5. 4. The geochemical status of the surface water and the sediments in the estuary of the Sangis River, Kalix, Sweden

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Anton Sandberg; [2023]
    Nyckelord :Framboidal pyrite; dredging; Sangis River; estuary; redox ladder; sediment; sediment cores; SEM-EDS;

    Sammanfattning : It has been common in forestry and agriculture to drain waterlogged areas through ditching in order to cultivate them. The ditches that drain water are usually connected to some watercourse, such as a river. LÄS MER

  7. 5. Petrography of impactites from the Dellen impact structure, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Robert Mroczek; [2023]
    Nyckelord :Dellen; Impact; structure; magnetite; apatite; shock waves; shock-metamorphic; features; Impactite; petrography; scanning electron microscope; SEM; geology; Earth and Environmental Sciences;

    Sammanfattning : Identification and characterization of shock-metamorphic features in hypervelocity impact craters is important for our understanding of how shock waves interact with geologic materials and how impact craters form, which in turn is essential to our understanding of what role impact cratering played in the development of our solar system. Of particular interest are accessory minerals like apatite, which contains various volatiles that can affect the atmosphere of a body, or magnetite whose magnetic properties constitute a remote sensing indicator which allows us to study and understand the internal structures of distant bodies. LÄS MER